Yes I can see why it might have gone on for decades, since we're already 6 pages into this thread and no one has even attempted to answer the first question, which will allow us to take the first step.

It begins to look to me as though the ownership reality is actually unclear for everyone, including even Hyperion... Which tells me that the most effective way to find out who the real owners are, may be to actually get legally served (by hosting AmigaOS sources), and then challenge it, so that the structure is made crystal clear.